Reach your goals 24 hours a day. Tracks steps taken, distance travelled, calories burned & active minutes Also tracks hours slept & quality of sleep Works with iPod, iPhone, iPad,and select Android smartphones Syncs in real time with smartphone, PC or Mac via Bluetooth® wireless Lets you track progress via FREE Fitbit Apple or Android Apps Water-resistant Silent alarm Wireless module can be swapped out between different-color wristbands (sold separately) Fitbit Flex motivates you 24/7. Flex™ is your perfect companion. Wear it on your wrist day and night and it will track all of your activity. Just check out the lights to see how you stack up against your personal goals. It's the motivation you need to get out and be more active. Set your goals. Sync your stats. Flex uses LED lights to show you how your day is stacking up against your personal goal. Sync your stats real-time directly on select iPhone and Android devices and computers. See your stats anytime. Also with some Android devices, you can tap your device to launch your Fitbit stats. Track your goals with online & mobile tools. You can set goals, track your activity, sleep trends, log food, workouts, and more. And like with all Fitbit trackers, you can earn badges, connect with friends to share and compete for extra encouragement. Wear Fitbit Flex all the time—and with anything. Flex™ never leaves your side. It fits comfortably around your wrist all day and night. Slim and stylish, Flex is available in lots of colors that look good no matter what you're wearing. You can take this tiny tracker out and put it into any of Flex's colorful fitness bands to fit your wardrobe or mood. Look cool, get fit. Order your Fitbit Flex Wireless Activity and Sleep Wristband from Brookstone today. Supported mobile devices include: Apple: iPhone 5s, 5c, 5 iPhone 4s iPod Touch (5th Gen) iPad Air, iPad 4, iPad 3 iPad mini Android: MOTOROLA DROID MINI, ULTRA, MAXX, RAZR HD, RAZR HD MAXX, RAZR MMOTOROLA MOTO E, MOTO G (4.3 +), MOTO X HTC ONE M8, MAX (4.3 +), MINI (4.3 +), M7 (4.3 +), DROID DNA (4.4.2), EVO 4G LTE (4.3 +) LG OPTIMUS L90, G FLEX, OPTIMUS L70, G PRO2, VU 3.0, G2, G PAD (4.3 +) SONY XPERIA Z1 COMPACT (4.3 +), Z1S (4.3 +), Z1F (4.3 +), Z1 (4.3 +), Z (4.3 +), ZL (4.3 +), SP (4.3 +), ZR (4.3 +), Z ULTRA (4.3 +), T (4.3 +), TX (4.3 +), VL (4.3 +), V (4.3 +), AX (4.3 +), TABLET Z (4.3 +) GOOGLE NEXUS 4, 5 AND 7 (2013) PANTECH VEGA SECRET UP (4.4.2), LTE-A (4.4.2) HUAWEI ASCEND P7 (SOPHIA) Whats Included: Tracker Small & Large Wristbands Charging Cable Wireless Sync Dongle Free Fitbit Account Dimensions: .5" L x 3.75" W x 3" H .25 lbs. Wristband Dimensions: Small band: 5.5"—6.9" Large band: 6.3"—8.2" Battery Life: 5-7 days Lithium-polymer Bluetooth is a registered trademark owned by Bluetooth SIG, Inc. and any use of such marks by Fitbit is under license. Mac and iPhone are trademarks of Apple Inc., registered in the U.S. and other countries. All other trademarks remain property of their respective owners.